The wireless linksys router is connected directly with a wire to the PC using VISTA. I am using a cable modem that is not a problem. The internet connection is intermittently lost and this can happen any time of the day or night. When internet connection is lost I cant go online, VOIP telephone dies and the PC that is wirelessly connected cannot go online. The online activity light on the modem is also dead. Router otherwise is ON. What we do in this situation is remove the power cord and connect back after 10-15 second and this brings back the internet connection. Everything works fine. Firmware for linksys router is up to date and sleep/power save option on PC is off. If I can do anything else please help. Thanks in advance.